Infill Optimization for Additive Manufacturing-Approaching Bone-Like Porous Structures
Infill Optimization for Additive Manufacturing-Approaching Bone-Like Porous Structures
复制标题
DOI：
10.1109/tvcg.2017.2655523
复制
发表时间：
2018-02-01
影响因子：
5.2
通讯作者：
Sigmund, Ole
中科院分区：
文献类型：
--
作者：
Wu, Jun;Aage, Niels;Sigmund, Ole
多孔结构如骨小梁广泛存在于自然界中。这些结构重量轻，并表现出强大的机械性能。在本文中，我们提出了一种方法来生成骨样多孔结构作为增材制造的轻质填充物。我们的方法建立在体素拓扑优化的基础上，并扩展了体素拓扑优化。特别是，为了生成稀疏而稳定的结构分布在一个给定的形状的内部，我们提出了在设计域中的每个体素附近的localizedmaterial体积的上限。然后，我们聚合的局部每体素的约束，其p-范数到一个等效的全局约束，以促进有效的优化过程。在高分辨率拓扑优化框架上实现，我们的研究结果展示了机械优化的，详细的多孔结构，模仿自然界中发现的结构。我们进一步展示了不同设计规格的优化结构的变体，并分析了所获得的结构的最优性和鲁棒性。
Porous structures such as trabecular bone are widely seen in nature. These structures are lightweight and exhibit strong mechanical properties. In this paper, we present amethod to generate bone-like porous structures as lightweight infill for additive manufacturing. Ourmethod builds upon and extends voxel-wise topology optimization. In particular, for the purpose of generating sparse yet stable structures distributed in the interior of a given shape, we propose upper bounds on the localizedmaterial volume in the proximity of each voxel in the design domain. We then aggregate the local per-voxel constraints by their p-norm into an equivalent global constraint, in order to facilitate an efficient optimization process. Implemented on a high-resolution topology optimization framework, our results demonstrate mechanically optimized, detailed porous structures which mimic those found in nature. We further show variants of the optimized structures subject to different design specifications, and we analyze the optimality and robustness of the obtained structures.